I just wanted to add, that I did my last fast while I was emotionally unwell and working. I am not saying that my adrenals are depleted only because of the fast but I think I did not do it at the right time. We are exposed to more toxins than lets say 40 or 100 hundred years ago and a lot of the information we read about Water Fasting were from a much less polluted period of time, and still they all suggest check do a check up with your doctor first, and do it at a time when you can have a complete rest.
And I am sorry but a ton of toxins coming out of your body, are stressful to your kidneys and liver. So it is not a bad idea to ask people who want to undertake Water Fasting for the first time to take it slow. Avid fasters are different than first time fasters as their body have already gone through some cleansing process.